Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/11353
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dc.contributor.authorAlan, Büşra Öykü-
dc.contributor.authorBarışık, Murat-
dc.date.accessioned2021-11-06T09:46:58Z-
dc.date.available2021-11-06T09:46:58Z-
dc.date.issued2021-
dc.identifier.issn0927-7757-
dc.identifier.issn1873-4359-
dc.identifier.urihttps://doi.org/10.1016/j.colsurfa.2021.127407-
dc.identifier.urihttps://hdl.handle.net/11147/11353-
dc.description.abstractSilica nanoparticles (SNP) with different sizes and surface areas are used in numerous micro/nanofluidic applications, while their surface charge properties play a major role in their function. In many of these applications, SNPs also undergo temperature variation. We present that an increase in temperature yields a substantial increase in SNP surface charge depending on nanoparticle size and surface roughness, which cannot be estimated by existing theory. As a continuation of our earlier work characterizing the deviation of SNP surface charging from theoretical predictions due to curvature and EDL overlap effects, this study presents the differentiation from the theory in temperature dependence under various conditions. As we calculate surface chemistry as a function of local ionic conditions (Charge Regulation), temperature variation changed the equilibrium constants of protonation/deprotonation reactions of the SNP surface, in addition to changes occurring in relative permittivity and ionic mobilities. Results show that variation of SNP surface charge by temperature decreases by decreasing particle size and/or increasing roughness size, compare to theoretical flat plate calculations considering similar temperature-dependent properties and charge regulation on the surface. We characterized these deviations by obtaining an electrokinetic similarity between different systems of various size and roughness at various ionic conditions based on the non-dimensional groups of lambda/DP and lambda/DR. Based on these, we devised a phenomenological model as an extension to the flat plate theory to successfully predict the surface charge of SNPs as a function of the particle size, roughness size, and temperature. The current findings are important for the characterization of SNPs through temperature variations and can also be used to adjust the surface charge of SNPs by tuning the temperature.en_US
dc.description.sponsorshipThis work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under the Grant Number 118M710. Authors also would like to thank Center for Scientific Computation at Southern Methodist University.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofColloids and Surfaces A: Physicochemical and Engineering Aspectsen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectSurface charge densityen_US
dc.subjectSilica nanoparticlesen_US
dc.subjectCharge regulated surfaceen_US
dc.subjectNanoscale surface patternsen_US
dc.subjectRoughnessen_US
dc.subjectTemperature dependenceen_US
dc.titleSize and roughness dependent temperature effects on surface charge of silica nanoparticlesen_US
dc.typeArticleen_US
dc.authorid0000-0002-2413-1991-
dc.institutionauthorAlan, Büşra Öykü-
dc.institutionauthorBarışık, Murat-
dc.departmentİzmir Institute of Technology. Mechanical Engineeringen_US
dc.identifier.volume629en_US
dc.identifier.wosWOS:000703567000002en_US
dc.identifier.scopus2-s2.0-85113802606en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1016/j.colsurfa.2021.127407-
dc.identifier.wosqualityQ2-
dc.identifier.scopusqualityQ2-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.grantfulltextopen-
crisitem.author.dept03.10. Department of Mechanical Engineering-
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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